DESC: The DuraFon 4X provides the longest range of ANY cordless phone, with up to 12 floors in building penetration, 250,000 square feet of warehouse coverage, or up to 3,000 acres of range on a farm or ranch. The DuraFon 4X can also be used as a 2-way radio with handset-to-handset intercom use and broadcast capability from handset-to-handset, to an entire group or to one individual in the network.